Mercurial > dropbear

annotate libtomcrypt/src/mac/blake2/blake2smac.c @ 1857:6022df862942

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Use DSCP for IP QoS traffic classes The previous TOS values are deprecated and not used by modern traffic classifiers. This sets AF21 for "interactive" traffic (with a tty). Non-tty traffic sets AF11 - that indicates high throughput but is not lowest priority (which would be CS1 or LE). This differs from the CS1 used by OpenSSH, it lets interactive git over SSH have higher priority than background least effort traffic. Dropbear's settings here should be suitable with the diffservs used by CAKE qdisc.
author Matt Johnston <matt@ucc.asn.au>
date Tue, 25 Jan 2022 17:32:20 +0800
parents 6dba84798cd5
children
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9
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10 #include "tomcrypt.h"
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11
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12 #ifdef LTC_BLAKE2SMAC
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13
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14 /**
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15 Initialize an BLAKE2S MAC context.
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16 @param st The BLAKE2S MAC state
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17 @param outlen The size of the MAC output (octets)
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18 @param key The secret key
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19 @param keylen The length of the secret key (octets)
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20 @return CRYPT_OK if successful
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21 */
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22 int blake2smac_init(blake2smac_state *st, unsigned long outlen, const unsigned char *key, unsigned long keylen)
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23 {
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24 LTC_ARGCHK(st != NULL);
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25 LTC_ARGCHK(key != NULL);
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26 return blake2s_init(st, outlen, key, keylen);
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27 }
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28
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29 /**
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30 Process data through BLAKE2S MAC
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31 @param st The BLAKE2S MAC state
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32 @param in The data to send through HMAC
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33 @param inlen The length of the data to HMAC (octets)
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34 @return CRYPT_OK if successful
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35 */
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36 int blake2smac_process(blake2smac_state *st, const unsigned char *in, unsigned long inlen)
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37 {
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38 if (inlen == 0) return CRYPT_OK; /* nothing to do */
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39 LTC_ARGCHK(st != NULL);
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40 LTC_ARGCHK(in != NULL);
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41 return blake2s_process(st, in, inlen);
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42 }
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43
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44 /**
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45 Terminate a BLAKE2S MAC session
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46 @param st The BLAKE2S MAC state
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47 @param mac [out] The destination of the BLAKE2S MAC authentication tag
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48 @param maclen [in/out] The max size and resulting size of the BLAKE2S MAC authentication tag
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49 @return CRYPT_OK if successful
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50 */
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51 int blake2smac_done(blake2smac_state *st, unsigned char *mac, unsigned long *maclen)
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52 {
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53 LTC_ARGCHK(st != NULL);
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54 LTC_ARGCHK(mac != NULL);
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55 LTC_ARGCHK(maclen != NULL);
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56 LTC_ARGCHK(*maclen >= st->blake2s.outlen);
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57
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58 *maclen = st->blake2s.outlen;
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59 return blake2s_done(st, mac);
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60 }
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61
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62 #endif
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63
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64 /* ref: $Format:%D$ */
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65 /* git commit: $Format:%H$ */
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66 /* commit time: $Format:%ai$ */